We did the dolphin swim and the sea lion swim there, kids had a blast!!!
We booked directly with the park, not the boat. RCCl will charge you for the kids... Bests to keep the money in your own pocket.
We saw the encounter, and the younger kids there seemed very happy.
Afterall, not many of them at the younger ages really want to swim with them, just touching them was enough.
Have fun and hope this helps